Progress against the field
Between Amsterdam 2024 and Heerenveen 2025, Maarten ter Horst and Arnoud Liefers lost 5:42 to the field.
Over the same races everyone got 3:37 quicker, so 2:05 slower on the clock looks better than it was.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
5 races · 5 events
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Heerenveen14 May 2026Individual Open · Men1:20:17 PB121/315Beat 62%
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Heerenveen9 May 2025Doubles Open · Men1:07:43120/529Beat 77%
↑ 211 days after Amsterdam 2024, with Arnoud Liefers 5:42 worse than the field Why ↓Close ↑
5:42 behind the field: 2:05 slower on the clock, against 3:37 faster for everyone.
The fieldCompare these two →3:37 faster This pair2:05 slower -
Amsterdam10 Oct 2024Doubles Open · Men1:05:38 PB99/855Beat 88%
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Amsterdam4 Nov 2023Doubles Open · Mixed1:14:03 PB44/283Beat 85%
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Amsterdam22 Oct 2022Doubles Open · Mixed1:17:1163/170Beat 63%